Where does we use is?

I'm curious, could you clarify the context in which the phrase "where does we use is?" is being used? As it stands, the sentence structure seems a bit off, and it's not immediately clear what you're asking. Are you asking about the applications of a particular technology, perhaps in the realm of cryptocurrency or finance? Or are you seeking clarification on the proper usage of a grammatical structure? Providing a bit more context would help me give you a more accurate and relevant answer.